Displacement pump for piles



`lune 12, 1934. Q ATWELL DISPLACEMENT PUMP FOR PILES Filed Aug. 8, 1933 m H 6 r m 22 0 Ge BY Patented June 1 2', 1934 DISPLACEMENT George J. Atwell, New

George J.

PUMP FOR PILES York, N. Y., assignor to Atwell Foundation Corporation, New

York, N. Y., a corporation of New York Application August 8,

8 Claims.

This invention relates to pumps, and more particularly to a displacement pump for piles of the tubular type which, after being driven, are nlled with fluent filling material. Y

One object of the invention is to enable seepage, such as ma'y nd its way into the pile along its joints, to be conveniently removed preparatory to the placing of the lling material into the pile.

Another object is to assure the utilization of the maximi'im force of the displacing medium.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specication and in which similar reference numerals refer to similar parts,

Figure l is an elevation of a displacement pump constructed in accordance with the practice of the invention and showing it arranged within a pile, the pile being shown in section,

and

Figure 2 is an elevation, partly in section, of the displacement pump showing the parts in thepositions they occupy during the time liquid is being expelled from the pump.V

Referring to the drawing, and at first more particularly to Figure 1, the displacement pump, designated by 6, is shown disposed with a pile 7 comprising a plurality of sections 8 which are united at adjacent ends by a connection 9 extending into the ends of the pile sections and having an external flange 10 against which the sections 8 seat. On the leading end of the lowermost pile section 8 is a pile point 11 which 35 seals the end of the pile and displaces the embedding material' 12 under the water 13.

The pump 6, constructed in accordance with the practice of the invention, comprises a casing 14 having a chamber 15 for liquid which 40 may enter the chamber 15 through an inlet opening 16 in the bottom of the casing 14. An outlet is provided for the chamber 15 in the form of a discharge pipe 17 which extends through a head 18 at the top of the casing 14 l5 and may be welded to said head, as indicated The lower end of the discharge pipe 17 lies adjacent the bottom of the casing 14 and the pipe is of suitable length to extend above the top of the pile 7. At its upper end the pipe 17 is provided with a downwardly directed portion 20 `so that liquid being discharged through the pipe will be directed toward the material wherein the pile is embedded.

`The head 18 may consist of a separate member 1933, Serial No. 684,140 (Cl. 10S- 240) and is secured, as by means of bolts 21, to a flange 22 lying within the upper end of the casing 14 and to which `it may be welded. On

the upper surface of the head 18 is a guide member 23 of frusto-conical s hape to guide the casing 14 through obstructions in the pile, such as the connection 9 the casing therewith.

A closure is provided and prevents engagement of for the inlet opening of the casing to effectively seal the inlet opening 16.

The gasket 27 may be secured to the Valve 24 in any well known manner and may consist of leather or other pliable sealing ma To the end that the val terial. ve may be held against shifting its position, rotatively, with respect to the casing, the casing is pin or pins 28 ,which ext 29 `in the valve 24 provided with a guide end through apertures and serve, as an additional function, to prevent lateral movement of the Valve 24 with respect to its seating surface.

Pressure actuated means are provided for maintaining the valve in the open position to permit the entrance of li 15 and also to close th quid 'into the chamber e valve and maintain it closed during the time the liquid is being ejected from the chamber. der 30 is disposed on the To this end a cylinhead 18 in coaxial alignment with the inlet opening 16, and within the cylinder 30 is a piston of which the lowermost the valve 24. The ends reduced diameter to exte 31 and the valve, and th threaded for whereby the valve 24 clamped to the rod 32.

On the exterior of the 34, which seats uponv the 31 having a rod 32 end is connected to of the rod 32 are of nd through the piston e ends of the rods are the accommodation of nuts 33 and the piston 31 are cylinder 30 is a flange head 18, and bolts 35 extending through the iiange 34 secure the cylinder 30 to the head. cylinder 30 constitutes taining packing material rod 32 and is compressed into the stung box 36.

jects through an aperture The inner end of the a stuiling box 36 con- 37 which encircles the by a gland 38 threaded The stuiling box pro- 39 in the head 18 and is threaded exteriorly for the accommodation of an internally threaded guide member 40 which projects downward ly into the chamber 15 in parallelism with the discharge pipe 17 and preferably closely adjacent thereto.

In the wall of the guide member 40 are vents 41 which communicate with the discharge pipe 17 through a T-connection 42 interposed in the pipe 17 and being welded with its stern 43 to the exterior of the guide member 40. The vents 4l are preferably arranged ait a sufficiently high elevation so that the upper portion of the chamber 15 will be in communication with the discharge pipe 17, thereby providing an outlet for atmospheric air displaced by the liquid entering the chamber 15.

A closure is provided for the vents 41 in the form of a piston 44 mounted on the rod 32 to reciprocate therewith. The piston 44 is slidable in the guide member 40 and serves as a crosshead to stabilize the intermediate portion of the rod 32.

The upper and lower surfaces of the piston 31 constitute pressure areas 45 and 46, respectively, and pressure fluid applied to the pressure area 46, for raising the piston 31 and the elements connected thereto, is conveyed to the pressure area 46 by a supply conduit 47 threaded with one end to the cylinder 30. The other end of the conduit 47 is connected to a valve casing 48 containing a throttle valve 49 whereby communication between a source of supply and the conduit 47 may be controlled.

The throttle valve 49 may be of the rotary plug type having a lever 50 for its manipulation and has a supply chamber 51 which may communicate with the supply conduit 47 through a port 52 in the wall of the throttle valve. In the periphery of the throttle valve is a groove 53 to communicate the conduit 47 with an exhaust port 54 in the valve casing 48.

In addition to the function described, the throttle valve 49 also serves to control the supply of pressure fluid to the pressure area 45 for closing the valve 24, and to control the supply of pressure fluid to the chamber 15 for displacing the liquid therein. A conduit 55 is accordingly connected to the valve casing 48 and to a head 56 of the cylinder 30. The conduit 55 is so arranged that pressure fluid may be supplied thereto through the port 52 in one position of the position of the is communicated with the discharge port 54 by the groove 53.

Leading from the conduit 55 is a branch 57 which extends through the head 18 into the upper Zone of the chamber 15. On the end of the branch 57 projecting into the chamber 15 is a valve casing 58 having ports 59 through which pressure fiows from the Valve casing 58 into the chamber 15. The ports 59 are controlled by a plunger 60 slidable in the casing 58 and being opposed on its opening movement by a spring 6l which may be calibrated to yield at a predetermined value of the pressure fluid acting against the valve 60 tending to open it. In order to enable the tension of the spring 61 to be conveniently regulated said spring is seated with one end upon a spring seat 62 mounted on the end of a screw 63 in the end of the valve casing 58.

The operation of the device is as follows: After the displacement pump is arranged within the pile the throttle valve 49 is shifted to a position to admit pressure uid through the conduit 47 into the lower end of the cylinder 30 to act against the pressure area 46. The pressure uid thus admitted into the cylinder raises the pistons 3l and 44 and the valve 24. Water then enters the chamber 15 through the inlet opening 16 and the air displaced by the water escapes through the vents 41 and the discharge pipe 17 to the atmosphere.

After the passage of a period of time considered sufficient for the filling of the chamber 15 with water the throttle valve 49 is shifted to place the port 52 in registry with the conduit 55 and the groove 53 in registry with the conduit 47 and the exhaust port 54 in the casing 48. The pressure fluid in the lower end of the cylinder then escapes to the atmosphere.

Upon communicating the conduit 55 with supply, pressure fluid flows into the branch 57 and into the cylinder to act against the pressure area 45. The pressure fluid flowing into the cylinder 30 depresses the piston 45 to close the valve 24 and to move the piston 44 into position for closing the vents 41, thus cutting off communication between the chamber 15 and the supply pipe 17 at that point.

With the spring 61 in the casing 58 adjusted to yield at a predetermined pressure, say thirty pounds, the ports 59 will remain sealed by the plunger 60 until the pressure reaches that or such other value as may be found necessary to effect prompt closing of the valve 24. After the pressure fluid in the conduit 55 and the branch 57 exceeds that which the spring 6l is intended to withstand the plunger 60 uncovers the ports 59 and pressure fluid flows into the chamber 15 and expels the water through the discharge Vpipe 17 to the surface. This cycle of operations may be repeated until the interior of the pile 7 has been evacuated and the pile is in condition to receive the filling material.

In practice the present invention has been found to be highly efficient. Owing to the manner in which the valve 24 is controlled and to the provision of the means for delaying admission of pressure uid into the chamber 15 until after the valve 24 is closed the device will operate with certainty and with a minimum consumption of pressure fluid since, as will be readily appreciated, all the apertures, other than the main discharge pipe 17, through which pressure fluid and water might otherwise pass will be adequately sealed before the displacing medium enters the chamber 15.

I claim;

1. A displacement pump, comprising a casing having inlet and outlet openings for liquid and a vent, a valve to control the inlet opening, pressure actuated means for operating the valve, means carried by the pressure actuated means for controlling the vent, a common means for introducing pressure fluid into the pressure actuated means and into the casing to close the valve and to displace liquid in the casing, and means for preventing the admission of pressure uid into the casing prior to the actuation of the pressure actuated means for closing the valve.

2. A displacement pump, comprising a casing having inlet and outlet openings for liquid and a vent, a valve to control the inlet opening, pressure actuated means for operating the valve, means connected to move with the valve for controlling the vent, a common conduit to supply pressure fluid to the pressure actuated means and the casing for closing the valve and for displacing liquid in the casing, and a spring opposed valve to prevent admission of pressure Iuid into the casing prior to the actuation of the pressure actuated means for closing the valve.

placing liquid in the casing.

5. A displacement pump, comprising a casing having an inlet opening for liquid, a valve to control the inlet opening, a discharge pipe havof pressure uid into the casing prior to the actuation of the pressure actuated means for closing the valve.

6. A displacement pump, comprising a casing the vent and for expelling liquid from the casing through the discharge pipe.

7. A displacement GEORGE J. ATWELL. 

